Poultry drinking cup



FIG. 1 is a perspective view taken from the top, front and left side of a poultry drinking cup showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image of the right side shown;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a right side elevational view of a modified form of the poultry drinking cup shown in FIG. 1, the left side being a mirror image of the right side shown. 

The ornamental design for a drinking cup, as shown and described. 